{"id":"RLSA-2026:85321","summary":"Important: kernel security, bug fix, and enhancement update","details":"The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: openvswitch: defer tunnel netdev_put to RCU release (CVE-2026-31678)\n\n* kernel: xfrm: espintcp: do not reuse an in-progress partial send (CVE-2026-52935)\n\n* kernel: sctp: diag: reject stale associations in dump_one path (CVE-2026-52917)\n\n* kernel: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done (CVE-2026-63801)\n\n* kernel: sctp: fix race between sctp_wait_for_connect and peeloff (CVE-2026-63971)\n\n* kernel: usb: typec: tcpm: bound altmode_desc[] per iteration in svdm_consume_modes() (CVE-2026-63962)\n\n* kernel: sctp: avoid auth_enable sysctl UAF during netns teardown (CVE-2026-68162)\n\n* kernel: tipc: clear sock-\u003esk on the failed-insert path in tipc_sk_create() (CVE-2026-68117)\n\n* kernel: sctp: auth: verify auth requirement when auth_chunk is NULL (CVE-2026-68300)\n\n* kernel: sctp: validate stream count in sctp_process_strreset_inreq() (CVE-2026-68315)\n\n* kernel: Bluetooth: hci_sync: Fix advertising data UAFs (CVE-2026-74509)\n\n* kernel: sctp: keep chunk-\u003etransport in step with the list it is queued on (CVE-2026-74588)\n\n* kernel: sctp: validate cookie AUTH state before use (CVE-2026-74752)\n\n* kernel: smb: client: reject a tree connect response whose byte count is too small (CVE-2026-89631)\n\n* kernel: smb: client: fix OOB read/write from unvalidated DataOffset in coalesce_t2() (CVE-2026-89633)\n\n* kernel: signal: Prevent exec() race (CVE-2026-98256)\n\n* kernel: exec: Cleanup POSIX timers right after de_thread() (CVE-2026-98260)\n\nBug Fix(es) and Enhancement(s):\n\n* [10.2.z] kselftests: mm: hugepage-mremap: Bail out! mremap: Expected failure, but call succeeded (JIRA:Rocky Linux-181987)\n\n* [IBM 10.3 FEAT] zcrypt driver overwrite  function - kernel part [rhel-10.2.z] (JIRA:Rocky Linux-245336)\n\n* Batch: z-stream xfrm - rhel-10.2.z (NST-Core-26W38) (JIRA:Rocky Linux-256678)\n\n* RHIVOS - [backport] S32G Driver Enablement - USB (JIRA:Rocky Linux-257228)\n\n* Fix pending kernel issues for L1VH GA - Kernel (JIRA:Rocky Linux-267038)\n\n* Backport 6785011f8b16 (\"ipv4: validate checksum_start before completing checksum\") [rhel-10.2.z] (JIRA:Rocky Linux-280590)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-10-21T12:30:02.604618184Z","published":"2026-10-21T12:08:03.045090Z","upstream":["CVE-2026-31678","CVE-2026-52917","CVE-2026-52935","CVE-2026-63801","CVE-2026-63962","CVE-2026-63971","CVE-2026-68117","CVE-2026-68162","CVE-2026-68300","CVE-2026-68315","CVE-2026-74509","CVE-2026-74588","CVE-2026-74752","CVE-2026-89631","CVE-2026-89633","CVE-2026-98256","CVE-2026-98260"],"database_specific":{"license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","source_advisory":"RHSA-2026:85321"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:85321"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2461761"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492098"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492115"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502254"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502331"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502356"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513314"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513397"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513408"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513474"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516967"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521384"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2524422"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532089"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532230"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546482"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546491"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:85321"}],"affected":[{"package":{"name":"kernel","ecosystem":"Rocky Linux:10","purl":"pkg:rpm/rocky-linux/kernel?distro=rocky-linux-10&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:6.12.0-211.67.1.el10_2"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:85321.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}